AI Article Synopsis
- Two-dimensional magnetic materials allow researchers to study complex spin fluctuations and design magnonic excitations.
- Recent findings demonstrate the emergence of moiré magnon excitations from the interactions between spin-excitations in monolayer CrBr and the underlying substrate's lattice mismatch.
- The study confirms the existence of moiré magnons through inelastic quasiparticle interference, illustrating a dispersion pattern linked to the moiré length scale for enhanced visualization of these excitations.
Article Abstract
Two-dimensional magnetic materials provide an ideal platform to explore collective many-body excitations associated with spin fluctuations. In particular, it should be feasible to explore, manipulate, and ultimately design magnonic excitations in two-dimensional van der Waals magnets in a controllable way. Here we demonstrate the emergence of moiré magnon excitations, stemming from the interplay of spin-excitations in monolayer CrBr and the moiré pattern arising from the lattice mismatch with the underlying substrate. The existence of moiré magnons is further confirmed via inelastic quasiparticle interference, showing the appearance of a dispersion pattern correlated with the moiré length scale. Our results provide a direct visualization in real-space of the dispersion of moiré magnons, demonstrating the versatility of moiré patterns in creating emergent many-body excitations.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10141560 | PMC |
| http://dx.doi.org/10.1021/acs.nanolett.3c00417 | DOI Listing |
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